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Finding the Fourth Proportional to 645,732.50, 891,110.84 and 359,252.51

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Solution

The fourth proportional to 645,732.50, 891,110.84 and 359,252.51 is: 495,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,732.50 : 891,110.84 = 359,252.51 : x
  2. Step 2: Convert to fraction form
    645,732.50/891,110.84 = 359,252.51/x
  3. Step 3: Cross multiply
    645,732.50x = 891,110.84 × 359,252.51
  4. Step 4: Simplify right side
    645,732.50x = 320,133,799,706.39
  5. Step 5: Solve for x
    x = 320,133,799,706.39/645,732.50
  6. Step 6: Final answer
    x = 495,768.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.